Type-writing machine.



No. 710,812. l Patented ogn, |902.

c. H. sHEPAnn. TYPE WRITING MACHINE.

(Application led VJune 14, 1900.)

MTNEESE'E: @a 7%@ UNITED STATES l PATENT OFFICE.

CHARLES Il. SHEPARD, OF BROOKLYN, NEW YORK, ASSIGNOR TO WYCKOFF, SEAMANS da BENEDICT, OF ILION, NEl/V YORK, A CORPORATION OF NEW YORK.

TYPE-WRITING MACHINE.

SPECIFICATION forming part of Letters Patent No. 710,812, dated October 7, 1902. Application led ,Tune 14, 1900. Serial No. 20,288. (No model.)

To all whom, t may concern:l

Beit known that I, CHARLES Il. SHEPAED, a citizen of the United States, and a resident of the borough of Brooklyn, city of New York, in the countyof Kings and State of New York, have invented certain new and useful Improvements in Type-lVriting Machines, of which the following is a specification.

My invention relates to platen-releasing devices; and its object is to provide a simple and inexpensive device for releasing the linespace wheel from the control of its check or detent and simultaneously applying friction to the axis of the platen, so that the platen may be given ne rotative adjustment and held in its adjusted position.

My invention consists in certain features of construction and combinations of devices, all as will be hereinafter more fully set forth, and particularly pointed ont in the appended claims.

In the accompanying drawings, showing my invention carried out in oneV form, Figure 1 is an elevation of the right-hand end of the platen-frame of a Remington No. 6 type-writing machine provided with a throw-off insaccordance with my improvement and showing the parts in normal position. Fig. 2 is a fragmentary plan view of the right-hand end of the platen-frame. Fig. 3 is an elevation of the line-space wheel, check, and throw-olf, the last being shown in working position; and Fig. e is a perspective view of the throw-orf.

In the several views only enough of said Remington machine is illustrated to show the relation of rnyimproveuient thereto, and similar parts are designated by similar numerals of reference. A f

1 indicates a cylindrical platen, which is fixed upon a shaft or axle 2, journaled in the end bars of a platen-frame 3 and which at its right-hand end is provided with a line-space wheel 4f, engaged by a check-roller or detent which is pivotally mounted upon the end of a leaf-spring 6, secured'by a screw 7 to the under side of the rear portion of the platenframe. The platen is rotated either by a finger-Wheel 8, secured upon the outer end of the platen-shaft, or by means of the usual line-spacing lever and pawl, (not shown, but which may be seen in the patent to L. P.

Diss, dated November l5, 1898, No. 614,244) the check 5 cooperating with the teeth of the line-space wheel 4 to hold the platen against accidental rotation. Owing to the engagement of said check with said teeth, however, it is not convenient to turn or adjust the platen slightly to cause the types to print above or below the line of writing, and it is also impracticable to write upon ruled lines, which are not ordinarily spaced apart in accordance with the spacing of the teeth upon said wheel.

Upon the hub 9 of the line-space wheel I pivot a bell-crank comprising a short upright plate-like arm 10, having notch 11 and cam edge 12, and a forwardly-extending arm 13, provided with a lateral finger-piece 14, which overhangs the end bar of the platen-frame. Said arm 10 is arranged in line with the outer prong 16 of the fork upon said spring 6, which embraces said roller 5 and stands between the line-space wheel and a short standard 15, which is usually fixed upon the inside face of the end barof the platen-frame.

When it-is desired to operate the platen independently of the usualline-spacing devices, the finger-piece 14 is lifted and the arm 10 swung rearwardly, the cam-surface 12 thereon contacting with the edge of the prong or eye 16 and forcing the latter upwardly and then permitting it to drop into the notch or seat 11, which is placed at such a distance from the axis 2 as to enable the arm to support the check 5 out of engagement with the ratchet-wheel, as shown at Fig. 3, so that the platen may be rotated by the finger-wheel 8 or otherwise through any desired arc. The pressure of the line-space check-spring 6 is borne by the throw-off arm 10 and not onl)T holds the latter in working position, but also causes a considerable frictional resistance to the rotation of the platen, the friction occurring both at the periphery of the line-space wheel-hub, which serves as a pivot for the throw-off, and also at the journal of the platenaxis in the right-hand bar ofthe platen-frame and being suficient to prevent accidental rotation of the platen during the usual Inovernents of the carriage While the type-impressions are being made and while the carriage is being returned to begin anew line or swung up to exhibit the writing. Obviously the hub IOO or collar 9 may be made of sufficient diameter to produce any desirable degree of friction at this point. When it is desired to reengage the check With the line-space Wheel, the nger-piece 14 is depressed to cause the throw-o to resume its normal position, as shown at Fig. 1, and the check snaps into one of the notches in the line-space wheel.

It will be seen that I have provided an inexpensive throw-oit which is simple in construction and operation and may be readily applied to existing machines. While I have shown my improvement as applied to a Remington machine, it will be understood that-it isalso applicable to machines of other design, and changes may be made in details of construction and arrangement in adapting the device to other machines Without departing from the scope of the invention, one of the main features of the invention being to transmit the pressure of the spring to the axis of the platen, Whether the axis be in the form of a shaft, tapered pin, stud, or other style of journal, and so as to increase the friction at the journ al-bearings instead of applying pressure to the surface of the platen by means of a shoe, as in prior instances.

It will be observed that the throw-oft is supported by the platen-shaft and is preferably mounted concentricallywith the platen and upon a hub or collar 9, which is mounted upon said shaft and rotates with the platen, and that the pressure of the check-spring is transmitted to the platen-axle independently of both the line-space Wheel and the platen.

That I claim as new, and desire to secure by Letters Patent, is-

1. In a type-writing machine, the combination of a platen-frame, a rotatable platen, a line-space Wheel, a check, a check-spring, and a throwo connected to transmit the pressure of said spring to a platenjournal independently of the platen and so as to produce frictional resistance to rotation of the platen.

2. In a type-writing machine, the combination of a platen-frame, a platen journaled therein, a line-space Wheel, a hub or collar mounted concentrically With the platen and turning therewith, a spring-pressed cheek, and a device constructed to throw oi said check and simultaneously subject to pressure both said hub or collar and a platen-journal.

3. In a type-Writing machine, the combination with a platen-i`rame, of a platen journaled therein, a line-space Wheel, a check, a check spring, and means for subjecting a platen-journal to the pressure of said spring independently of saidV line-space Wheel or platen and so as to produce frictional resistance to rotation of the platen.

et. In a type-Writing machine, the combination of a platen-frame, a platen journaled therein, a hub or collar mounted toturn with said platen, a line-space Wheel, a check, a check-spring, and means for subjecting the periphery of said hub or collar to the pressure of said spring.

5. In a type-writing machine, the combination of a platen-frame, a platen, a platen-shaft jcurnaled in said platen-frame and to which said platen is secured so as to turn therewith, a line-space Wheel, a check, a check-spring, and a throw-off supported by said platenshaft, and enabling the pressure of the checkspring to be transmitted to the said shaft.

6. In a type-Writing machine, the combination of a platen-frame, a platen journaled therein, a line-space wheel, a hub or collar, a check, a check-spring, and a throw-oii mounted upon said hub or collar.

7. In a type-Writing machine, the combination with a platen-frame, of a platen journaled therein, a line-space Wheel, spring 6, roller 15, and throw-off 10 having cam 12, seat 11, arm 13, and iinger-piece 14.

8. In a type-writing machine, the combination With a platenframe, a platen journaled therein, a line-space Wheel, a check, and a check-spring, of a throw-od arranged in line with a part of said spring so as to act directly thereon to dex the same and mounted concentrically with the axis of said platen.

9. In a type-Writing machine, the combination of a platen-frame, a platen, a ratchet- Wheel, a spring-pressed detent, and a bellcrank lever mounted axially of the platen shaft or journal, for throwing oft' the detent and transmitting the pressure of the spring to the platen shaft or journal and through it to the platen itself.

Signed at the borough of Manhattan, city of New York, in the county of New York and State of New York, this 13th day of June, A. D. 1900.

CHARLES H. SHEPARD. Wvitnesses:

K. V. DONOVAN, E. M. XVELLs. 

